Remove support for pkg_install
Merge back bsd.pkgng.mk into bsd.port.mk
Add a note about @stopdaemon not being supported anymore
With hat: portmgr
Differential Revision: https://reviews.freebsd.org/D693

- improve detection installed openssl port
With about 1000 ports installed,
there is a perormance gain about 50% with emty cache
and about 25% when files are in cache.
Submitted by: Vladimir Chukharev, Doug Barton
- OPENSSL_INSTALLED could now be set by bsd.port.subdir.mk for further caching.

Add support for DESTDIR part I.
This commit should largele be a NOOP as it only adds support
for DESTDIR undefined. This does allow us to start testing
ports with DESTDIR set, but this is as of yet not supported.
Although this has been extensively tested on pointyhat, this
is a very intrusive change and some cases may have been
overlooked. Please contact Gabor and me if you find any.
PR: 100555
Submitted by: gabor
Sponsored by: Google Summer of Code 2006